Coaster-brake.



coAssn BRAKE. APPLICATlON FILED NOV. 3| HHS. gie Eatente May L 19??.

2 SHEETS-SHEET l.

l mi@ I. J. IOBIN.,

coAsTER BRAKE. APPLICATION FILED NOV. 3,1915.

@.w Patented May 1, 19u.

2 SHEETS-SHEET 2.

arranged at opposite sides of the median lines of the members 34, as clearly shown in 10 and 11. The projections 236 are adapted to interlock with shouldered lugs 39' secured to, and equidistantly spaced about7 the inner periphery of the hub 21 for driving the latter as hereinafter described, and the projections Si' coperate with arms 40 carried by a disk 41 and arranged in an annular series abou-t the periphery of said d' k and extending lengthwise of the axle 11i, the outer ends of these arms which are preferably serrated, as indicated at 42, extending:T into the path ot the projections 3'? for engagement therewith whenv the latter are projected beyond the periphery oit the cage 2f), .for producing' braking action, as hereinafter described,

The disk 41 which surrounds the shaft 13 and is rotatable thereon, has a sleeve-extension 43 which passes through, and forms a support for, an expansible braking element 44 formed of springy material, which is split as indicated at 4V and is adapted to be expanded into frictional engagement with thev inner surface of the hub 21 for braking' the latter. lnteriosed between the brakino' elcment 44 and the d'sk 41, is a lever 4G which has at one end a laterally-extending section 47, oreiierably of elliptical shape in cross-sec tion, which extends into, and loosely lits, a similarly-shaped recess 48 pro vvided between the opposing;` surt"v ees ot the element 44 at its split portion45. The opposite end of the lever 46 is recessed as indicated at 4S) at which it registers with a pin 50 extending laterally from the disk 41. lu the operation of the device, as hereinafter more i'ully described, for braking,r the wheel, the lever 46 is rocked on its extension 4i' as a pivot. thus expanding the element 44 agraiiist the hub 21, and to hold the clement Yi4 rigidly against rotation, thc iiieii'iber lil, which is preferably interlocked with an arm :il which in practice would be attached lo the traine of the bicycle7 to hold the member '16 against rotation, is provided with laterally-extending lugs 52 which enter, and interlock with, corrcspondiugly-shaped recesses in the opposing end of the element 44.

rThe operation of the device is as follows:

When the spi'ocket-wlioel 18 not being driven and the pa o t the device are in iiorinal position, the projcc'ifiins 5,56 and S7 do not project beyond the periphery of the cage 2S and the element 44 is out or braking cona tact with the inner surface of the hub 21. TWhen tbe spi'ocket\i'lieel 1S is driven in a clock-wise direction, then the member 1? with its pinion-extrusion 2F, driven infthe direction oi the arrow in Fig. il, and by reason of the eng-aimaient ot the pinion 28 with the racks Si?. the nienil'iers o4 are actuated in the cage 2) in opposite directions to project them at their sections 36 beyond the vlmrlhery of th@ Cage 29 and into engage.

ment with Ithe shoulders of the lugs 39 on the hub 21, as represented in Fig. 9, to drive the wheel forwardly, certain of the arms 40, by preference, being provided with springs 54 which exert su'liicient pressure against the cage 29 to overcome the resistance offered by the members 34 to movement to said position, and therefore insure the interlocking or' the projections with the lugs 39.

ll'yhen it is desired to brake the wheel, the operator by slightly back-pedaling' rotates the sprocket-wheel 1S, relative to the revolving hub 21,` in a counter clockwise direction, to a degree sufficient to move Athe members 34 in the direction opposite to that first described, to a position in which the projections 37 protrude beyond the cage 29 and engage at their edges with opposing edges of the arms 40 and interlock therewith, or mesh at their serrations 38 with the seri-ations 42 on these arms. The force of back-pedaling is thus communicated to the disk 41 rotating the latter counter clockwise, the pin 50 in this movement rocking the lever 46 on its eX- tension 47, with the result of expanding the element 44 into braking engagement with the hub 21, the braking force thus exerted being proportional to the back-pressure exerted on the sprocket-wheel 18.

The coaster-position of the device, namely that in which the sprocket 18 is not in driving connection `with the hub 21 and the brake is released, is elliected by the operator shifting the sprocket 18 to a position in which the projections 36 and 37 are withdrawn into the cage L9, as will be readily understood.

As" an obvious modification of the struerupted by the provision of the arms 40 as described, may be continuous as represented* in Fig'. 13, and the desired interlock ofthe projections 37 for producing the braking action may be effected wholly by the engagement ot the outer surfaces of these projections, preferably at sci-rations as those indicated at 38, with the seri-ations 42 on suchi continuous surface, or by any desirable friction means, and the saine character of engagement may be provided between the projections 256 and the hub 21, which latter to this end would have the annular series of teeth Q1, as represented vin part in Fig. 14, instead of vthe intel-locks effected between these projections and the shouldered sur- Afaces of the .lugs 39, as described.

lt is of course obvious that in place of the wheel hub any' other element acting in a similar way and i'iX'edly secured to the Wheel would be the equivalent in its uses to the use of the hub ot' the wheel as part of my structure herein, and in the claims in using the words wheel hub it is to be construed of'lao nascere course as including such equivalent structure.. l

While have'illustrated and described a particular construction embodying my invention and suggested certain modilications thereof, other modifications and alterations ymay be made Without departing 'from the spirit of my invention.

What I claim as new and desire to secure by Letters Patent is l. ln a device of the character described, the combination with a wheel-hub, of a driving element, a cage, and means mounted in said cage shift-able transversely of said hub adapted to occupy alternative positions de pending upon the direction of torce exerted bysaid driving element and including a sec tion provided with a i:aek, said means being interposed between said ele-nient and said hub, to alternately drive or brake said hub and said element including a pinion meshing with said rack.

2. In a device of the character described, the combination with a Wheel-hub5 'of a driving element, cage, and means mounted in said cage shiftable transversely ot said hub adapted to occupy alternative positions pending upon the direction of torce exerted. by said driving element and including sections each provided with a rack, said ineens being interposed between said element and said hub to alternately drive or brake said hub, said velement including a pinion and said sections meshing at their racks with said pinion. I

3. in a device of the character described, the combination with a Wheel-hub7 ota driving element, a cage, shifting means guidingly confined in said cage andy interposed between said element and said hub and adapted to occupy alternative positions depending upon the direction of force exerted. by said driving element and including a section provided with a rack, said element in'- cluding a pinion intermeshing with said rack, and means stationarily mounted relative to said first-named means andadapted to coperate with said irst-named means when in one of its alternative positions.

4. In a device of the character described7 the combination with a Wheel-hub, of a driving element, shifting means interposed between said element and said hub, said means being guidingly mounted to be movable in a straight line transversely of the deviceV and affording portions adapted to occupy alternative positions depending upon the direction ofl force exerted by said driving elcment, said portions being disposed in difierent positions along the axis of said device, one of said portions said hub, and a braking mechanism for said hub, positioned for cooperation with the other portion of said shifting means for acbeing adapted to drive,

tuation thereby when the latter is in one oi its alternative positions.'

5. In a device ot the character described, the combination `with a wheel-hub, of a driving element, shitting interposed between said element and said hub7 means being movable transversely of the do vice and atording 'portions Iadapted to oc cupy alternative positions depending upon the direction of force exerted. by said driving element, said portions being disposed in dii'ierent positions along the axis ot said device, one of said portions being adapted to drive said 'nnb7 a cage in which said shifting means are gnidingly confined to have straight line movement, and a braking mechanism for said hub positioned for coperation with the other portion of said shi i g eans actuation thereby when the iatter is in oneoi2 its alternative posions 6. In a device the character described, the combination nth a Wbeeinnb7 oi a drii ing element, i means interposed, between said element and said hub, said including a plurality oi members iocated at opposite sides ot the of the deviceand movable transversely ci 'the device, and'eacii affording portions adapted 'to occupy aiteiH native pos"ions upon the direcn tienerK force exerted by said driving element? and means operated said driving element said .members7 said portions positions along for actuating being disposed 1n difierent the axis of said device one o the portions being adapted tov on each of saidv lnernbeis drive said hub, and a braking mechanism for said hub positioned. tor coperation with the other portions o said members for actoa ,ion thereby when tbe latte* are in one oi' their alternative positions.

7. in a device ot the character described, the combination with a Wheel-hub, of a drining element, shifting means interposed bstWeen said element and said hnb` said means including a plurality of members located at opposite sides oi" the of the device and guidingly mounted to be movable in a straight line transversely of each affording portions adapted to occupy alternative positions depending upon the direction oi torce exerted by said driving element, said portions being disposed in diliien ent positions alongythe axis of said device, one ot the portions on each of said members being adapted to drive said hub, and a braking mechanism for said hub, positioned for cperation with the other lportions of said members, for actuation latter are in one of their alternative positions.

tween said element and said hub, said means said the device and Y thereby when the f i including a plurality of members located at opposite vsides ot tbe axis of the device and movable transversely thereof, and affording portions adapted to occupy alternative positions, i'iepending upon the direction o' force exerted by said driving eleirent, said por.- tions being disposed in ditte-rent positions along the axis of said device, one of tbe por tions on each oit' said members being adapted to drive said hub, a cage in ngl'iicli said plurality oil' members' are guidingly confined to hav; straight line movement, and a braking mechanism for said hub positioned for cooperation with the .other `portions of said1 members for actuation thereby when the latter are in one of their alternative positions. 9. in a device of the character described, tbe combination with a wheel-hub, of a driving` elenient, a sbiftable member interposed liemvemi said' element and linb movable transversely ci tbe de y"ice and atl'ording portions adapted to occupy alternative positions depending,r upon the direction of Jtorce ertcd by said driving element, said portions being disposed in diii'erent positions along the axis oi? said device, one of: said portions being; adapted to drive said hub, said mem l .ir being' formed with a rack, and said drivir element having a pinion intermeshing ivnb said rack, and a braking mechanism for said lieb positionedl for coperation Witbtbe -tion of said sbiftable member for thereby when the latter is lin one ii. fl et its alternative positions. y

i0. in a device ot tbe character descr1bed, the combination with a wlieel-liub, of a driving element, aembers interposed between said elen'ient and. nnb and novable transversely ot' the device and each affording portions adapted to occupy alternative positions udepcnidinw upon the direction of force erred l l, 1e said driving; element, said portions being disposed diiercnt 'positions alonlf tbe axis of said device, one of said on each member being' adapted to 'i .e said heb, said members being provided iid driving; element b'aving csbingg with said racks, and in for said li-nb positioned tbe otl mations of a pinion interw a braking mecbanis tion by wien tbe native posi ions.

il. in :i device of A'be ('.liaracter described, title com nation with a wheel-indi. of a orivingr clcimnt, a caire, means for yieldinrjly re-I nee/isis straining the rotation of said cage, and means for alternately driving and braking said hub, including a shift-,able element through the medium of which the l'iub is alternately driven and braked, guidingly confined in said cage and adapted to occupy alternative positions depending` upon the direction of torce exerted by said driving element.

l2. In a device of the character described, the combination with a Wheel-hub, of a drivingclement, a sliiftable member interposed between said' hub and said driving element, a cage in which said sliii'table element is guidingly confined, said sbiftable element being adapted to occupy alternative positions depending' upon the direction of force exerted by said driving, element and operating whenv in one ci its positions to drive said hub, a

' brake for said hub, means for operating said brake adapted to be actuated by .said shittable element when in the other of its alternative positions, and means carried by saidlast named means for yieldingly restraining rotation or' said cage.

13. In a device 'of the character described, the combination of an axle, a Wheel`-hub su rounding said axle and rotatable thereon, a

'driving clement rotatable on said axle, a,

cage surrounding said axle, shiftable members located at opposite sides ofsaid axle and guidingly confined in said cage to be movable transversely of said axle, each of said members being provided at opposite ends with portions disposed in different positions along the axis of said device, a pinion operatively connected with said driving element and interposed between said members, racks on said members engaging said pinion, one portion of each of said members being adapted to engage with, and drive, said bob, when said driving element is rotated in one direction, a braking,r device, a i'ianged member surrounding said axle and having movement relative to said axle, means interposed between said last-named member vand said braking device, operating' when said last-named member is moved to actuate said braking device, the other portions of said movable member being adapted to engage with, and actuate, said lastnamed member .iflien. said driving element 1s rotated in tbe oppositedirection.

OTIN J. TOBIN. En presence of- D. C. TnonsnN, n. C. Fisonrn. 

